CTS Turbo BMW F90 M5/M5C & BMW G15/G16 M8/M8C HIGH-FLOW CATS DOWNPIPE SET

CTS Turbo high-flow cat downpipes maximize exhaust flow for the biggest gains on the F90 M5/M5C and G15/G16 M8/M8C. Designed with the latest CAD technology to fit perfectly in place of the restrictive factory catalytic converters, they are manufactured from cast T304 stainless steel, hand TIG welded and back-purged for years of reliable service. Beyond unleashing the 4.4 twin-turbo S63, they bring a louder, deeper growl with pronounced crackle on downshift and a confident punch through all 8 gears — even louder paired with an aftermarket exhaust.

Details

• 80mm or 3.15" diameter piping
• Cat size: 110mm OD x 90mm long, or 4.33" OD x 3.54" long
• Includes 200-cell sport catalytic converters
• Designed and tested on a real car in the real world
• Cast T304 stainless steel, TIG welded and back-purged
• Replaces the restrictive factory catalytic converter
• Incredible sporty sound, subtle when cruising
• No drone with factory exhaust

Fitment (M cars with S63 engine only)

• 2018-2024 F90 BMW M5 (including Competition models)
• 2019-2024 G15/G16 M8 Coupe, Convertible and Gran Coupe (including Competition models)

Stage 2 tuning software must be used to remove the CEL that will occur.

Emissions disclaimer: This product is not legal for sale or use on pollution-controlled vehicles operated on public roads and is intended for off-road, race, or closed-course competition use only. You are responsible for compliance with all applicable emissions laws; use on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state laws. Please check your local laws before purchase and installation.

Ships from our Vancouver shop — KORE SPEED is proudly Canadian-owned, with no surprise cross-border duties for Canadian buyers. Questions on fitment? Email support@korespeed.com.